if CLISP was built for a 64-bit CPU. This could
be useful on platforms with 64-bit CPUs which have a 32-bit mode
emulation (e.g., i386 is
emulated on x86_64
and ia64) so that the user can
decide which ABI library to load dynamically using “FFI”.

if hardware = PC (clone). It can be used as an
indicator for the mainstream hardware characteristics (such as the
existence of a graphics card with a non-graphics text mode,
or the presence of a keyboard with arrows and
Insert/Delete keys,
or an ISA/VLB/PCI bus) or software characteristics (such as the
Control+Alternate+Delete keyboard
combination).